Pasteurizer



Dec. 26, 1933. B. TRUDEL l A Trop/Vfl,

B. TRUDEL PASTEURIZER Dec. 26, 1933.

Filed Aug, 24, 1931 A 2 sheets-sheet 2 N .wwwa

[wwf/v70@ Bano/ Truc/e/ A TTG/@Vfl Patented Deca gti, 1933A @am ot-Fics] -Qgnebec, Canada api/:scarna august ze, 193i.

signor to E. Trudel d: Cie. Ltee., Montreal,

Serial No: 559,049

1 can.v (ci. 2er- 208) 'This invention relates to improvernents in pas teurizers and the objects of the invention are to improve the eliiciency of the machine, to permit of v liquid being or to be pasteuri-Zed being held at the proper temperature, to allow the heating or cooling fluid being circulated around the paeteuriser; to so construct the machine that the interior'will be smooth and capable of .being `kept in a clean and sanitary condition; to provide means whereby the cooling or heating fluids will be maintained for the proper length of time in contact with the wall of the pasteurizer, so that they may eiectively give up or receive heatV therefrom; and generally to adapt the machine to better perform the .flincticns required of it.A t

So that the nature of my invention will beclearly understood, I haveillustrated a preferredeinbodiinent of the saine, but I wish it to be under- ;stood that I do not limit myself to this precise cons struction, but reserve the right to modify the same within the scope ofmy appendedV claim, in which what I claim as being newr is clearly set out.

.In the drawings, e,

,l'figure l is a side elevation, partly sectional,v of my improved pasteuri'zer.v v l kFigure 2 is a half transverse section, half .end elevation, ofthe same.

Figure 3 is an end view of my pasteurizer, part of the wall being broken away to show the circu.-

- lating path of the cooling or heating fluid.

Like characters of reference refer to like parts in theseveral figures.

Referring tothe drawings,

,n represents the pasteurizer comprising ,an in.-v

ner container 10, which is ,formed with a semicylindrical lower wall, the -upper portion of the container being open.l The side, end and bottom -walls of this container are provided with ns Aor Aribs l1, which spirally wind around the container. 'These ribs vco-act with a second container 12 which has a semi-cylindrical bottom ,and the ribs 11 contact with the side, end and bottom walls of the second container so that a continuous path fof a spiral nature is provided between the two conltainers which insures the flow of fluid through this passage-way of a positive and steady nature, so .that the iluid will be held for a suicient period of time in Vcontact with the walls of the inner container and so give up heat thereto or abstract heat therefrom;

I provide a third container 13 which surrounds the second container and is provided with a semicylindrical bottom and this container is spaced vfrom the second container by a plurality of channel members 14 and the space formed between the outercontainer and thesecond container forms an air jacket, therebyrpreventing a dissipation of heat or cold from the pasteurizer. V'This air space between the container 13 and the container 12 can be filled with cork, Wood, insulating board or other insulating material that it is desired to adopt, in order. to insure Amore eiciency in preventing -a dissipation of heat or cold from the pasteurizer.

A cooling .or heating iluid .which is to .be circulated aroundthe inner container Yis admitted to the passageway between the inner container v10 and the second container 12 through the-entrance' pipe 15 and after the iiuid has circulated right around the inner container it is discharged at the upper end through the exitpipe 16. LThe function of introducing the cooling fluid through'lthe entrance 15 at the lower endy of the pasteuri'zer is Vto allow the fluid, when at its proper temperature, to come in contact with the wall of the inner container andsoexert its proper action on the jfluid which is being pasteurized, that is to say,vfor instance7 ii the inner container was .half-n lled` with cream or mille, thenif it is tobe pasteurized, theh'ot liuid which would lenter the entrance ,pipe l5 would, when" at its hottest temperature, be brought in contact with that portion' of Ythe inner container 1,0 'ihcontactl with the bodyof the milk or cream, so givingY I'up its heat thereto and, in this way, it will be realized there is no dissipation o f heat until after the fl'uid'has performed the functions desired of it. Y

yThe same thing applies to a cooling kiluid being circulated through this passage-way to cool the liquid which is being pasteurized in the machine.

To facilitate withdrawing thepasteurized fluid from the machine, I provide an outlet conduit 17 with a valve 18 therein, so that the pasteurizer may be emptied or drained off whenithe process of pasteurizing the fluid therein has been completed.

The inner container includes a rounded bottom, a pair of side walls 22, 23 and a pair of end walls 24. The walls 23, 24 extend above the wall 22. The wall 23 has lits upper portion above the wall v22 extending inwardly at an inclination, as at 21. Each of the walls 24 has the topV edge thereof formed of a pair of oppcsitely upwardly inclined portions merging into eachother at their inner ends, one of said edge portions being of greater length and of less inclination than the other. The inwardly inclined upper portion 2l of the wall 23 yregisters with the said inclined top edge portions of smallest length of the walls 24. Hinged at its v upper end, as at 26 to theupper end of portion 21 and seating upon the said inclined top edge portions of greatest length 0f the walls 24 and upon the top edge of wall 22 is a closure 20.

A cover 19 is mounted on the upper end of the inner container and is spaced from the other container. Y

The pasteurizer is mounted on a suitable stand or brackets 25.

When a liquid, such as milk or cream, is to be pasteurized, it is delivered into the inner container 10 and the cover 19 is adjusted preparatory to starting the pasteurizing process. A hot iiuid, such as water, is then delivered through the inlet pipe 15 and circulated upwards through the winding passage-way between the walls of the inner container and the second container and, during its passage, this water gives up its heat to the milk or cream being pasteurized.

The milk or cream is kept in a state of agitation by paddles or screws, which are not shown, but which maintain the cream or milk in the proper condition to take up the heat from the circulating liquid around the inner container 10.

When the pasteurizing has been completed and it is desired to cool off the milk or cream, then Y a cooling fluid may be delivered through the pipe 15 and circulated through the winding passageway and be discharged through the outlet 16. The outer air jacket between the outer container 13 and the second container 12 is to prevent any loss of heat from the circulating iluid, so that all the heat from the circulating fluid will be given to the milk or'cream within the pasteurizer.

While I have referred to circulating heating fluid, it will be understood that water will generally be used, but the circulation and temperature of the water may be controlled by means of steam jets, not shown and which may be located anywhere on the pasteurizer to give the proper desired eilect. The steam will be supplied from` any suitable source of power and the controlling of the steam will be under the control of the operator of the pasteurizer.

I may use a circulating pump to circulate the heated water, if such is found advisable,y instead of the steam jet above referred to.

I would also like to emphasize that the pasteurizer may assume a different shape from that illustrated in the drawings, that is to say, it might be more or less of an elliptical nature, cylindrical, rectangular, or any other geometrical gure which will permit of the circulation of the iiuid in a manner which I have described, and also of the insulating of the second container from the outer atmosphere.

What I claim as my invention is:

A pasteurizer comprising an inner container formed of a bottom, a pair of side walls, one of greater height than and extending above the ther and a pair of end walls corresponding in height to that side wall of greater height and each having upper terminus formed of a pair of oppositely inclined edge portions merging into each other at their upper ends, said side wall of greatest height having an inwardly inclined upper portion registering with one of the inclined edge portions of each end wall, a closure hinged to the top of said inclined upper portion and seating upon the other of the inclined edge portions of the end walls and upon the top edge oi said side wall of smallest height, a spirally arranged continuous n disposed lengthwise of and having its inner edge abutting the outer face of said bottom and the outer faces of said walls below the top of the said end wall of smallest height, an open top intermediate container encompassing the'major portion of said inner container, abutting the outer edge of said iin throughout, having its upper terminus aligning with the top edge or" said wall of smallest height and forming in connection with said n and inner container a heating medium circulating passage of spiral form, an intake and outlet for said passage, an

outer container encompassing said intermediate container in spaced relation and having its upper end aligning with the upper terminus of said intermediate container, spacing means between said intermediate and outer containers abutting the it' ies 

